Chain pipe vise



Dec. 20, 1927.

I 5. J. WELTER CHAIN PIPE VI SE Filed April 25, 1925 V g V i v W i Ill-IL Patented Dec. 20, 1927.

UNITED." STATES T T OFFICE.

SEBASTIAN J. WELTER, OF CHICAGO, ILLINOIS, ASSIGNOR r ARMSTRONG BROS. TOOL 00., OF CHICAGO, ILLINOIs, A CORPORATION OF ILLINOIs.

CHAIN PIPE VISE.

Application filed April 23, 1925. Serial No. 25,244.

This invention relates to that type of chain pipe vises in which a pair of upstanding channeled and serrated jaws are fixed in spaced relation to each other on a supporting base and are adapted for holding or gripping engagement with a section of j .j

under the stress of a chain section encircling the crown of the pipe section, one end of which chain is adapted for fixed engage- Object:

To provide a structural formation and integral connection Of the counterpart and spaced holding jaws or anvils of the aforesaid type of pipe Vises, by means of which an integral and rigid connection of the jaws or anvils is attained, and so that a unitary structure embracing both jaws or anvils can be drop forged from tool steel, capable of being hardened at proper points for con tinud and effective holding engagement with a section of pipe to be Operated on,

all as will hereinafter more fully appear.

In the accompanying drawing:

Fig. 1, is an end elevation of a pipe vise to which the presentinvention is applied.

Fig. 2, is a side elevation of same with the chain member and its take-up mechanism Omitted.

Fig. 3, is a plan view of the same. Fig. 4, 1s a transverse section on l1ne 1- 1;,

Fig. 3.

Fig. 5, is detail perspective view of the integrally connected holding jaws of the in vention.

Like. reference numerals parts in the several views.

The supporting base 1 of indicate like the vise is of jaws 2, in spacedrelation to provide space for the reception and movement of the chain member 3 of the vise.

The upper ends of the jaws 2 are formed with positioning channels preferably of the V shape shown,

with such channels formed in turn with teeth or serrations i for effective holding engagement with the section ated on.

of pipe oper- The chain member 3, is of thensual fiat link type with one end attached to the movable member 5 of a take-up mechanism of any usual andsuitable formation and which is attached on the wider face of the supporting base i. From such take-up mechanism the chain ilextends upward and over the crown portion of the section of pipe operated on, and then downward for locking engagement with the supporting base 1, usually by an open sided slot 6 In the base '1 into which any desired link of the chain may be inserted, with the lowermost pivot pin 7 of said chain link having projecting ends for step engagement with the under margins of said slot. Such construction is usual to pipe vises of the present type and provides means for effecting the initial adjustment of the chainfor engagement with diflerent sizes of pipe sections to be operated The material part of this invention in the present type of chain pipe Vises, involves a construction in which the pair of separated holding jaws or anvils 2 are integrally connected together by a bridge piece 8 as asingle unit on forging of steel, capable of subsequent hardening and tempering Of'tllfi pipe holding surfaces of the jaws or anvils 2. In the preferred construction shown the upper edge or face of the central bridge piece 8 is on a. plane with the upper faces or edges of the jaws 2 and formed with continuations of the serrations of said jaws as shown.

The integrally formed holding member of the vice, so far described is integrally formed with rivet studs 9 on its lower corners for entry and fixed engagement in complemern tary orifices in the supporting base 1. In the preferred form of the invention shown, both the holding jaws 2 and the connecting bridge piece 8 have a maximum thickness at their mid-height 2 and are tapered from such mid-height towards their upper and lower ends, with a view to attain a maximum degree of rigidity with a minimum amount of material and at the same time afford av single piecestructure which can be readily and effectively produced by the drop forging method. I c

Having thus fully described my invention, what I claim and desire to secure by Letters Patent is:

1. A holding member for chain pipe Vises.

formed as a unit of tool steel capable of hardening and tempering, the same comprising a pair of holding jaws in separated relation, and an integrally formed central bridge piece connecting said jaws together, the holding jaws and bridge piece having their greater thickness at their mid-height and tapering therefrom towards their upper and lower ends.

2. A holding member for chain pipe vises formed as a unit of tool steel capable of hardening and tempering, the same comprising a pair of holding jaws in separated relation, and an integrally formed central brid s iece connectin said aws to ether;

5 1:5 J L? I said bridge piece having serrations aligned with the serrations of the jaws, the holding jaws and bridge piece having their greater thickness at their mid-height and tapering thgrefrom towards their upper and lower en s.

A holding membercfor chain pipe vises, the same comprising a pair of holding jaws in separated relation, and an integrally formed central bridge piece connecting said jaws together, the holding jaws and bridge piece having their greater thicknessat their mid-height and tapering therefrom towards their upper and lower ends.

r. A holding member for chain pipe Vises, the same comprising a pair of holding jaws in separated relation, and an integrally formed central bridge piece connecting said jaws together, said bridge piece having serrations aligned with the serrations of the jaws, the holding jaws and bridge piece having their greater thickness at their midheight and tapering therefrom towardstheir upper and lower ends.

Signed at Chicago, Illinois, this 21st day of April, 1925.

SEBASTIAN J. WELTER. 

